<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
         function People(){
            this.cloth = 'Tshirt'
        };
        function Student( name ){
            this.name = name
        }
        Student.prototype = new People()
        Student.prototype.constructor = Student
        var stu2 = new Student( '小红' )
        console.log( stu2.cloth )
        
        </script>
</body>
</html>